diff --git a/lectures/lecture-reusable-code-2.md b/lectures/lecture-reusable-code-2.md
index 43d3e33..7500e76 100644
--- a/lectures/lecture-reusable-code-2.md
+++ b/lectures/lecture-reusable-code-2.md
@@ -122,7 +122,7 @@ my_results
### Looping using functions
-#### Exercise 2: [Mass of dinosaurs with loops]({{ site.baseurl }}/exercises/Loops-size-estimates-by-name-loop-R) (30 min)
+#### Exercise 6: [Mass of dinosaurs with loops]({{ site.baseurl }}/exercises/Loops-size-estimates-by-name-loop-R) (30 min)
@@ -130,7 +130,7 @@ my_results
Practical uses of `for` loops
-#### Exercise 3: [Automatic analysis of muliple files]({{ site.baseurl }}/exercises/Loops-multi-file-analysis-R) (30 min)
+#### Exercise 7: [Automatic analysis of muliple files]({{ site.baseurl }}/exercises/Loops-multi-file-analysis-R) (30 min)
diff --git a/readings/before-opentree.md b/readings/before-opentree.md
deleted file mode 100644
index 6e34a46..0000000
--- a/readings/before-opentree.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-layout: page
-element: reading
-title: 'Getting phylogenetic trees'
-language: R
-pagetype: 'before class'
-symbol:
-week: "Apr 20"
----
-
-
-## Publications
-
-
-## Public data stores
-
-
-### Open Tree of Life
diff --git a/readings/before-reusable-code-loops.md b/readings/before-reusable-code-loops.md
index e75514f..8b770fd 100644
--- a/readings/before-reusable-code-loops.md
+++ b/readings/before-reusable-code-loops.md
@@ -5,7 +5,7 @@ title: 'Reusing code - Loops'
language: R
pagetype: 'before class'
symbol:
-week: "Apr 6"
+week: "Apr 6, 11"
---
## A) Prepare for in-class exercises
diff --git a/readings/before-tree-thinking.md b/readings/before-tree-thinking.md
index a02c82f..50d8770 100644
--- a/readings/before-tree-thinking.md
+++ b/readings/before-tree-thinking.md
@@ -8,6 +8,6 @@ symbol:
week: "Apr 25, 27"
---
-## A) Models and phylogenetic correlation
+## Models and phylogenetic correlation
- [How to measure and test phylogenetic signal](https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.2041-210X.2012.00196.x)
diff --git a/readings/before-trees-and-tables.md b/readings/before-trees-and-tables.md
index 2b90800..df38569 100644
--- a/readings/before-trees-and-tables.md
+++ b/readings/before-trees-and-tables.md
@@ -5,21 +5,20 @@ title: 'Joining trees and tables'
language: R
pagetype: 'before class'
symbol:
-week: "Apr 13, 18"
+week: "Apr 20"
---
-**Day 1**
-
-## A) Joining trees to data tables
+Complete the following readings:
- [What is phylogenetic analysis?](https://www.news-medical.net/health/What-is-Phylogenetic-Analysis.aspx)
- Read [Reading a Phylogenetic Tree: The Meaning of Monophyletic Groups](https://www.nature.com/scitable/topicpage/reading-a-phylogenetic-tree-the-meaning-of-41956/#:~:text=Phylogenies%20are%20useful%20for%20organizing,events%20that%20occurred%20during%20evolution).
-**Day 2**
-## B) Plotting data from tables on trees
-
+ -->
diff --git a/readings/before-trees-opentree.md b/readings/before-trees-opentree.md
new file mode 100644
index 0000000..a6b23de
--- /dev/null
+++ b/readings/before-trees-opentree.md
@@ -0,0 +1,36 @@
+---
+layout: page
+element: reading
+title: 'Getting phylogenetic trees'
+language: R
+pagetype: 'before class'
+symbol:
+week: "Apr 18"
+---
+
+- Follow the tutorial [Module 24: An Intro to Phylogenetic Tree Construction in R](https://fuzzyatelin.github.io/bioanth-stats/module-24/module-24.html).
+
+- In a new Rmd document, try to complete as many of the steps from the tutorial as you can.
+
+- Document the parts that are hardest to complete, and how much time it took you to figure out each one.
+
+- If you can't make all parts of the tutorial run, it is ok.
+
+- I just want to see that you tried to run most of them, and if you succed that is great! If not, that is ok too.
+
+
+
+
+
+
diff --git a/readings/before-visualizing-trees.md b/readings/before-trees-visualizing.md
similarity index 72%
rename from readings/before-visualizing-trees.md
rename to readings/before-trees-visualizing.md
index 6af8294..25d7c26 100644
--- a/readings/before-visualizing-trees.md
+++ b/readings/before-trees-visualizing.md
@@ -5,25 +5,29 @@ title: 'Visualizing trees'
language: R
pagetype: 'before class'
symbol:
-week: "Apr 11"
+week: "Apr 13"
---
-## A) Reading and plotting phylogenies
+## Reading and plotting phylogenies in base R
- Complete [introduction-to-phylogenetics](https://www.ebi.ac.uk/training/online/courses/introduction-to-phylogenetics/)
- Read [The Newick tree format](https://evolution.genetics.washington.edu/phylip/newicktree.html).
-- Watch [Introduction to CRAN and Bioconductor](https://www.youtube.com/watch?v=qAvJ92qCGqE).
-## B) Joining phylogenies to data tables
+
diff --git a/schedule.md b/schedule.md
index b879b66..07b8146 100644
--- a/schedule.md
+++ b/schedule.md
@@ -13,8 +13,8 @@ assignments: ['The Data Life Cycle', # the importance of programming for data sc
'Reusing code - Apply functions',
'Reusing code - Loops',
'Visualizing trees',
-'Joining trees and tables',
'Getting phylogenetic trees',
+'Joining trees and tables',
'Tree thinking',
# 'Public Data Stores',
'Review Week',