diff --git a/homework/tbdTest.rkt b/homework/tbdTest.rkt
new file mode 100644
index 0000000..c449a25
--- /dev/null
+++ b/homework/tbdTest.rkt
@@ -0,0 +1,13 @@
+#lang racket
+
+(require rackunit "tbd.rkt")
+
+(define hw-tests
+  (test-suite "scheme unit tests"
+              
+   (test-case "test fail"
+    (begin
+      (check-equal? 3 4)))))
+
+(require rackunit/gui)
+(test/gui hw-tests)
diff --git a/lectures/index.md b/lectures/index.md
index a1941a9..fe2704b 100644
--- a/lectures/index.md
+++ b/lectures/index.md
@@ -1,4 +1,5 @@
 # CS322 lecture notes
 * [semiotics](./semiotics.md)
 * [languages and machines](./chomsky.md)
-* [all about names](./names.md)
\ No newline at end of file
+* [all about names](./names.md)
+* [lambda calculus](./lambda.md)
\ No newline at end of file