diff --git a/src/re_frame/handlers.cljs b/src/re_frame/handlers.cljs
index 07fd2d5..495dd43 100644
--- a/src/re_frame/handlers.cljs
+++ b/src/re_frame/handlers.cljs
@@ -7,9 +7,9 @@
 
 (defn comp-middleware
   "Given a vector of middleware, filter out any nils, and use \"comp\" to compose the elements.
-  v can have nested vectors, and will be flattended before \"comp\" is applied.
+  v can have nested vectors, and will be flattened before \"comp\" is applied.
   For convienience, if v is a function (assumed to be middleware already), just return it.
-  Filtering out nils allows us to create Middlewhere conditionally like this:
+  Filtering out nils allows us to create Middleware conditionally like this:
      (comp-middleware [pure (when debug? debug)])  ;; that 'when' might leave a nil
   "
   [v]
@@ -17,7 +17,7 @@
     (fn? v)       v  ;; assumed to be existing middleware
     (vector? v)   (let [v (remove nil? (flatten v))]
                     (cond
-                      (empty? v)       identity     ;; noop middleware
+                      (empty? v)       identity     ;; no-op middleware
                       (= 1 (count v))  (first v)    ;; only one middleware, no composing needed
                       :else            (apply comp v)))
     :else         (warn "re-frame: comp-middleware expects a vector, got: " v)))
diff --git a/src/re_frame/middleware.cljs b/src/re_frame/middleware.cljs
index db54a1e..775c4c5 100644
--- a/src/re_frame/middleware.cljs
+++ b/src/re_frame/middleware.cljs
@@ -76,7 +76,7 @@
 
 (defn trim-v
   "Middleware which removes the first element of v, allowing you to write
-  more asthetically pleasing handlers. No leading underscore on the event-v!
+  more aesthetically pleasing handlers. No leading underscore on the event-v!
   Your handlers will look like this:
       (defn my-handler
         [db [x y z]]    ;; <-- instead of [_ x y z]
diff --git a/src/re_frame/router.cljs b/src/re_frame/router.cljs
index 0fc8ebc..0a39804 100644
--- a/src/re_frame/router.cljs
+++ b/src/re_frame/router.cljs
@@ -16,12 +16,12 @@
 
 ;; -- router loop ---------------------------------------------------------------------------------
 ;;
-;; In a perpretual loop, read events from "event-chan", and call the right handler.
+;; In a perpetual loop, read events from "event-chan", and call the right handler.
 ;;
 ;; Because handlers occupy the CPU, before each event is handled, hand
 ;; back control to the browser, via a (<! (timeout 0)) call.
 ;;
-;; In some cases, we need to pause for an entire annimationFrame, to ensure that
+;; In some cases, we need to pause for an entire animationFrame, to ensure that
 ;; the DOM is fully flushed, before then calling a handler known to hog the CPU
 ;; for an extended period.  In such a case, the event should be laballed with metadata
 ;; Example usage (notice the ":flush-dom" metadata):