diff --git a/content/notes/git-cheat-sheet.md b/content/cheatsheets/git-cheat-sheet.md
similarity index 100%
rename from content/notes/git-cheat-sheet.md
rename to content/cheatsheets/git-cheat-sheet.md
diff --git a/content/cheatsheets/latex-cheat-sheet.md b/content/cheatsheets/latex-cheat-sheet.md
new file mode 100644
index 000000000..78fef8615
--- /dev/null
+++ b/content/cheatsheets/latex-cheat-sheet.md
@@ -0,0 +1,15 @@
+---
+title: "latex-cheat-sheet"
+tags: 
+- cheatsheet
+---
+
+https://wch.github.io/latexsheet/latexsheet-0.png
+https://wch.github.io/latexsheet/latexsheet-1.png
+
+
+$\theta$
+
+$\leq \geq$
+
+
diff --git a/content/daily_notes/2022-04-07.md b/content/daily_notes/2022-04-07.md
index 89e226259..62b9bbc86 100644
--- a/content/daily_notes/2022-04-07.md
+++ b/content/daily_notes/2022-04-07.md
@@ -4,20 +4,7 @@
 
 # 2022-04-07
 
-<% tp.user.getAOTD() %>
-
-| # | task | P | A | e time | r time |
-|---| ------------------------|---|---|--------| ------ |
-| 1 | | | | | |
-| 2 | | | | | |
-| 3 | | | | | |
-| 4 | | | | | |
-| 5 | | | | | |
-| 6 | | | | | |
-| 7 | | | | | |
-| 8 | | | | | |
-
-> SCORE:
+Screamadelica - Primal Scream - spotify:album:3Kkocxhs4Ek537j67DFNd7
 
 ## 1 Todos
 - [ ] 12:00 Cosc201 lab
@@ -29,48 +16,26 @@
 
 ## 2 Lecture/Labs
 
-<%*
-const d = new Date().getDay()
-switch(d){
-case 1:
-tR+="- [ ] 11:00 Cosc202 Lecture\n- [ ] 12:00 Cosc201 lab"
-break;
-case 2:
-tR+="- [ ] 10:00 Info203 Lecture\n- [ ] 11:00 Cosc201 Lecture\n- [ ] 13:00 Info201 Lecture\n- [ ] 14:00 Cosc202 Lab"
-break;
-case 3:
-tR+="- [ ] 10:00 Info203 Lecture\n- [ ] 14:00 Info203 Tutorial\n- [ ] 16:00 Cosc201 Tutorial"
-break;
-case 4:
-tR+="- [ ] 11:00 Cosc202 Lecture\n- [ ] 12:00 Cosc201 Lab\n- [ ] 16:00 Info201 Lecture"
-break;
-case 5:
-tR+="- [ ] 09:00 Cosc202 Lab\n- [ ] 11:00 Cosc201 Lecture\n- [ ] 12:00 Info201 Lab"
-break;
-default:
-break;
-}
-%>
+- [ ] 11:00 Cosc202 Lecture
+- [ ] 12:00 Cosc201 Lab
+- [ ] 16:00 Info201 Lecture
 
 ## 3 Assignments
 
+- [ ] 203 Assignment 3
+	- [ ] Decide individual or not
+
 ## 4 Projects
+
 - python ai weekly review
 - CI notes site
 - my own password manager
 
-## 5 Timetable
+## 5 Links
+### 5.1 cosc 202
+- [lab book](https://cosc202.cspages.otago.ac.nz/lab-book/COSC202LabBook.pdf)
 
-![[Pasted image 20220311102444.png]]
+### 5.2 info 201
 
-## 6 Links
-
-### 6.1 cosc 202
-
-[lab book](https://cosc202.cspages.otago.ac.nz/lab-book/COSC202LabBook.pdf)
-
-### 6.2 info 201
-
-[tiddlywiki](https://isgb.otago.ac.nz/infosci/INFO201/labs_release/raw/master/output/info201_labs.html#)
-
-[Assignments](https://isgb.otago.ac.nz/info201/shared/assignments_release/raw/master/output/INFO201_Assignments.html)
\ No newline at end of file
+- [tiddlywiki](https://isgb.otago.ac.nz/infosci/INFO201/labs_release/raw/master/output/info201_labs.html#
+- [Assignments](https://isgb.otago.ac.nz/info201/shared/assignments_release/raw/master/output/INFO201_Assignments.html)
\ No newline at end of file
diff --git a/content/notes/06-business-functions-and-use-cases.md b/content/notes/06-business-functions-and-use-cases.md
index 01a5da5bf..fd2ce28cc 100644
--- a/content/notes/06-business-functions-and-use-cases.md
+++ b/content/notes/06-business-functions-and-use-cases.md
@@ -1,7 +1,8 @@
 ---
 title: "06-business-functions-and-use-cases"
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 [[notes/approaches-to-systems-development]]
diff --git a/content/notes/07-business-process-modelling.md b/content/notes/07-business-process-modelling.md
index b02a93e9e..3a028b127 100644
--- a/content/notes/07-business-process-modelling.md
+++ b/content/notes/07-business-process-modelling.md
@@ -1,7 +1,8 @@
 ---
 title: "07-business-process-modelling"
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 - understand core onepts realted to business process mondelling
diff --git a/content/notes/07-heuristic-evaluation-cont.md b/content/notes/07-heuristic-evaluation-cont.md
index 85f692d3a..41f1c4a4d 100644
--- a/content/notes/07-heuristic-evaluation-cont.md
+++ b/content/notes/07-heuristic-evaluation-cont.md
@@ -1,7 +1,8 @@
 ---
 title: "07-heuristic-evaluation-cont"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/07-testing.md b/content/notes/07-testing.md
index 743386847..4c30c83a5 100644
--- a/content/notes/07-testing.md
+++ b/content/notes/07-testing.md
@@ -1,7 +1,8 @@
 ---
 title: "07-testing"
 tags: 
-- cosc202
+- cosc202 
+- lecture
 ---
 
 - [[notes/testing]]
diff --git a/content/notes/08-business-patterns.md b/content/notes/08-business-patterns.md
index 324e2d046..969bdc380 100644
--- a/content/notes/08-business-patterns.md
+++ b/content/notes/08-business-patterns.md
@@ -1,7 +1,8 @@
 ---
 title: "08-business-patterns"
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 [[notes/entity-relationship-diagrams]]
diff --git a/content/notes/08-debugging.md b/content/notes/08-debugging.md
index b5a45853d..e0e1a05ef 100644
--- a/content/notes/08-debugging.md
+++ b/content/notes/08-debugging.md
@@ -1,7 +1,8 @@
 ---
 title: "08-debugging"
 tags: 
-- cosc202
+- cosc202 
+- lecture
 ---
 
 [[notes/debugging]]
diff --git a/content/notes/08-personas-and-scenarios.md b/content/notes/08-personas-and-scenarios.md
index e3d408983..76ac49254 100644
--- a/content/notes/08-personas-and-scenarios.md
+++ b/content/notes/08-personas-and-scenarios.md
@@ -1,7 +1,8 @@
 ---
 title: "08-personas-and-scenarios"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/09-data-modelling-and-normalisation.md b/content/notes/09-data-modelling-and-normalisation.md
index f8f6b3f0b..329931074 100644
--- a/content/notes/09-data-modelling-and-normalisation.md
+++ b/content/notes/09-data-modelling-and-normalisation.md
@@ -1,7 +1,8 @@
 ---
 title: "09-data-modelling-and-normalisation"
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 
diff --git a/content/notes/09-documentation.md b/content/notes/09-documentation.md
index d4e13cd2b..950efe88a 100644
--- a/content/notes/09-documentation.md
+++ b/content/notes/09-documentation.md
@@ -1,7 +1,8 @@
 ---
 title: "09-documentation"
 tags: 
-- cosc202
+- cosc202 
+- lecture
 ---
 
 [[documentation]]
diff --git a/content/notes/09-paper-prototypes-wiz-of-oz-video-prototypes.md b/content/notes/09-paper-prototypes-wiz-of-oz-video-prototypes.md
index 65015a4cd..fb50f5526 100644
--- a/content/notes/09-paper-prototypes-wiz-of-oz-video-prototypes.md
+++ b/content/notes/09-paper-prototypes-wiz-of-oz-video-prototypes.md
@@ -1,7 +1,8 @@
 ---
 title: "09-paper-prototypes-wiz-of-oz-video-prototypes"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/10-continuous-integration-1.md b/content/notes/10-continuous-integration-1.md
index 9f0facda6..bae89e264 100644
--- a/content/notes/10-continuous-integration-1.md
+++ b/content/notes/10-continuous-integration-1.md
@@ -1,7 +1,8 @@
 ---
 title: "10-continuous-integration-1"
 tags: 
-- cosc202
+- cosc202 
+- lecture
 ---
 
 [[continuous-integration]]
diff --git a/content/notes/10-design-heuristics-1.md b/content/notes/10-design-heuristics-1.md
index b880743ca..387e3a3ba 100644
--- a/content/notes/10-design-heuristics-1.md
+++ b/content/notes/10-design-heuristics-1.md
@@ -1,7 +1,8 @@
 ---
 title: "10-design-heuristics-1"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/10-heaps-and-heapsort.md b/content/notes/10-heaps-and-heapsort.md
index 62eb37367..c1e8c5eb0 100644
--- a/content/notes/10-heaps-and-heapsort.md
+++ b/content/notes/10-heaps-and-heapsort.md
@@ -1,5 +1,8 @@
 ---
 title: "10-heaps-and-heapsort"
+sr-due: 2022-04-08
+sr-interval: 3
+sr-ease: 250
 tags: 
 - cosc201 
 - lecture
diff --git a/content/notes/10-oop-concepts-and-uml.md b/content/notes/10-oop-concepts-and-uml.md
index c4c6622aa..6d68db8d0 100644
--- a/content/notes/10-oop-concepts-and-uml.md
+++ b/content/notes/10-oop-concepts-and-uml.md
@@ -1,7 +1,8 @@
 ---
 title: "10-oop-concepts-and-uml"
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 
diff --git a/content/notes/11-class-diagrams.md b/content/notes/11-class-diagrams.md
index a073d0205..4ce92d241 100644
--- a/content/notes/11-class-diagrams.md
+++ b/content/notes/11-class-diagrams.md
@@ -1,7 +1,11 @@
 ---
 title: "11-class-diagrams"
+sr-due: 2022-04-08
+sr-interval: 3
+sr-ease: 250
 tags: 
-- info201
+- info201 
+- lecture
 ---
 
 
diff --git a/content/notes/11-continuous-integration-2.md b/content/notes/11-continuous-integration-2.md
index c4cbbbd04..05a0b530d 100644
--- a/content/notes/11-continuous-integration-2.md
+++ b/content/notes/11-continuous-integration-2.md
@@ -1,7 +1,8 @@
 ---
 title: "11-continuous-integration-2"
 tags: 
-- cosc202
+- cosc202 
+- lecture
 ---
 
 1. apprecitae that gitlab is a xomplex software
diff --git a/content/notes/11-design-heuristics-2.md b/content/notes/11-design-heuristics-2.md
index 1385f8f17..08bce7797 100644
--- a/content/notes/11-design-heuristics-2.md
+++ b/content/notes/11-design-heuristics-2.md
@@ -1,7 +1,8 @@
 ---
 title: "11-design-heuristics-2"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/12-design-heuristics-3.md b/content/notes/12-design-heuristics-3.md
index 81411a6c6..3a0c62a66 100644
--- a/content/notes/12-design-heuristics-3.md
+++ b/content/notes/12-design-heuristics-3.md
@@ -1,7 +1,8 @@
 ---
 title: "12-design-heuristics-3"
 tags: 
-- info203
+- info203 
+- lecture
 ---
 
 
diff --git a/content/notes/aymptotic-notation.md b/content/notes/aymptotic-notation.md
new file mode 100644
index 000000000..53374dd16
--- /dev/null
+++ b/content/notes/aymptotic-notation.md
@@ -0,0 +1,28 @@
+---
+title: "asymptotic-notation"
+tags: 
+- cosc201
+- analysis-of-algorithms
+---
+
+Asymptotic notations are used in computer science to classify algorithms based how its space and time requirements grow as the input grows. 
+
+
+# big O notation
+
+Big O defines a bound for the *upper limit* of the running time (or space) of a algorithm. However, it is possible that the actual running time is much less as it does not take into account special cases
+
+
+## 1 Formal definition
+
+$f(n) = O(g(n))$ if there is some constant $A$ such that $f(n) < A \times g(n)$
+
+
+# big theta notation
+
+Big theta defines an upper and a lower bound for a the running time (or space) of an algorithm. 
+
+
+## 2 Formal definition
+
+$f(n) = \theta(g(n))$ if there are some constants $A$ and $B$ where $0 < B < A$ such that for all sufficiently large $n$, $B \times g(n) \geq f(n) \leq A \times g(n)$
\ No newline at end of file
diff --git a/content/notes/big-o.md b/content/notes/big-o.md
deleted file mode 100644
index 7c973bc03..000000000
--- a/content/notes/big-o.md
+++ /dev/null
@@ -1,16 +0,0 @@
----
-title: "big-o"
-tags: 
-- cosc201
----
-
->Big O means $f(n) = O(g(n))$ if there is some constant $A > 0$ such that for all sufficiently large n, $f(n) ≤ A × g(n).$
-
-- Big O provides *upper bounds* only. (usually on worst case runtimes)
-	- sometimes cost will be much less
-		- does not take special cases into account
-		- upper bound
-- $O$ says that $g(n)$ provides an upper bound for $f(n)$ 
-	- "Insertion sort is $O(n^2)$" -> the maximum number of basic operations in never more than some constanct times $n^2$
-- if $f(n) =O(g(n))$ then the opposite is also true
-- usually $f(n)$ is complex but $g(n)$ is very simple
\ No newline at end of file
diff --git a/content/notes/big-theta.md b/content/notes/big-theta-notation.md
similarity index 83%
rename from content/notes/big-theta.md
rename to content/notes/big-theta-notation.md
index 1af46af64..40e85ee66 100644
--- a/content/notes/big-theta.md
+++ b/content/notes/big-theta-notation.md
@@ -1,14 +1,17 @@
 ---
-title: "big-theta"
+title: "big-theta-notation"
 tags: 
 - cosc201
 ---
 
+
+
+
 >Big theta means $f(n) = \Theta(g(n))$ if there are constants 0 < B < A such that for all sufficiently large n, ==$B × g(n) ≤ f(n) ≤ A × g(n)$==
 
 - Upper and lower bound
 - $Θ$ says that $g(n)$ provides **upper** and **lower** bound for $f(n)$
-	- "selection sort is $\Theta(n^2)$" -> the maximum number of operations will be bounded bothh above and below by some constant times $n^2$
+	- "selection sort is $\Theta(n^2)$" -> the maximum number of operations will be bounded both above and below by some constant times $n^2$
 - $f(n) = \Theta(g(n))$ means that f and g have similar growth rates
 - if $f(n) = \Theta(g(n))$ then the opposite is also true
 - usually $f(n)$ is complex but $g(n)$ is very simple
diff --git a/content/notes/cosc-201-outline.md b/content/notes/cosc-201-outline.md
index 1993974a8..401f991f1 100644
--- a/content/notes/cosc-201-outline.md
+++ b/content/notes/cosc-201-outline.md
@@ -5,8 +5,8 @@ tags:
 - outline
 ---
 
-- [[notes/big-o]]
-- [[notes/big-theta]]
+- [[notes/aymptotic-notation]]
+- [[notes/big-theta-notation]]
 - [[notes/induction]]
 - [[notes/analysis-of-recursive-algorithms]]
 - [[notes/union-find]]
diff --git a/content/notes/git.md b/content/notes/git.md
index 58c2cfa7f..eb9025905 100644
--- a/content/notes/git.md
+++ b/content/notes/git.md
@@ -39,7 +39,7 @@ unknown users can fork then add a feature/bug then do a merge request which can
 
 ## 3 git repos
 
-[[notes/git-cheat-sheet|Repositories]] maintain code history
+[[cheatsheets/git-cheat-sheet|Repositories]] maintain code history
 can be conceptualised as a graph
 
 ```mermaid
diff --git a/content/notes/info-201-outline.md b/content/notes/info-201-outline.md
index 161a98e46..adab6813a 100644
--- a/content/notes/info-201-outline.md
+++ b/content/notes/info-201-outline.md
@@ -15,3 +15,8 @@ tags:
 - [[notes/approaches-to-systems-development]]
 - [[notes/business-functions]]
 - [[notes/use-case-diagrams]]
+- [[notes/business-process]]
+- [[notes/business-process-model]]
+- [[notes/business-process-model-and-notation]]
+- [[notes/UML]]
+- [[notes/entity-relationship-diagrams]]
\ No newline at end of file
diff --git a/content/notes/version-control-system.md b/content/notes/version-control-system.md
index f32f3ecd3..3321f9429 100644
--- a/content/notes/version-control-system.md
+++ b/content/notes/version-control-system.md
@@ -16,7 +16,7 @@ E.g., [[git]]
 - not restrict workflow
 
 ## 2 Terms
-[[notes/git-cheat-sheet]]
+[[cheatsheets/git-cheat-sheet]]
 
 ## 3 Discipline
 - Pull/Push Regularly