diff --git a/projects/project_lif/lif.tex b/projects/project_lif/lif.tex
index 343683c..dc24b05 100644
--- a/projects/project_lif/lif.tex
+++ b/projects/project_lif/lif.tex
@@ -50,8 +50,8 @@ time = [0.0:dt:tmax]; % t_i
     and compute $V(t)$ for $t_{max}=50$\,ms. Plot $V(t)$ and compare it to 
     the expected result of $V(t) = \exp(-t/\tau)$.
 
-    Vary the time step $\Delta t$ by factors of 10 and discuss
-    accuracy of numerical solutions. What is a good time step?
+    Vary the time step $\Delta t$ by factors of 10 and discuss the
+    accuracy of the numerical solutions. What is a good time step?
     Why is $V=0$ the resting potential of this neuron?
 
     \part Response of the passive membrane to a step input. 
@@ -65,9 +65,9 @@ time = [0.0:dt:tmax]; % t_i
 
     As an input we now use $E(t)=\sin(2\pi f t)$. Compute the time
     course of the membrane potential in response to this input
-    ($t_{max}=1$\,s). Vary the frequency $f$ between 1 and 100\,Hz.  Be
-    careful with the units within the sine function --- $ft$ must be
-    unitless.
+    ($t_{max}=1$\,s). Vary the frequency $f$ between 1 and 100\,Hz.
+    Be careful with the units within the sine function --- $f \cdot t$
+    must be unitless.
 
     What do you observe?