diff --git a/calibrations/13.txt b/calibrations/13.txt
index 9fc867b..d25276e 100644
--- a/calibrations/13.txt
+++ b/calibrations/13.txt
@@ -1,2 +1,2 @@
-There are 6 pink gold balls and 8 blue golf balls on the golf course.
-How many golf balls are there altogether?
+There are 6 pink christmas ornaments and 8 blue christmas ornaments on the christmas tree.
+How many christmas ornaments are there altogether?
diff --git a/calibrations/14.txt b/calibrations/14.txt
new file mode 100644
index 0000000..0ed4f26
--- /dev/null
+++ b/calibrations/14.txt
@@ -0,0 +1,3 @@
+Sara has 8 pieces of chocolate.
+Her mother gives her 4 more pieces.
+How many pieces of chocolate does Sara have now?
diff --git a/calibrations/15.txt b/calibrations/15.txt
new file mode 100644
index 0000000..93942f8
--- /dev/null
+++ b/calibrations/15.txt
@@ -0,0 +1,3 @@
+Alex has 7 doughnuts.
+Bennett has 4 doughnuts more than him.
+How many marbles does Bennett have?
diff --git a/calibrations/16.txt b/calibrations/16.txt
new file mode 100644
index 0000000..88218b7
--- /dev/null
+++ b/calibrations/16.txt
@@ -0,0 +1,3 @@
+Charlie gave 4 bottles to Mac.
+He has 8 bottles left.
+How many bottles did Charlie have in the beginning?
diff --git a/calibrations/17.txt b/calibrations/17.txt
new file mode 100644
index 0000000..c524292
--- /dev/null
+++ b/calibrations/17.txt
@@ -0,0 +1,3 @@
+Meathead has 6 newspapers.
+Archie has 7 newspapaers more than him.
+How many newspapers does Archie have?
diff --git a/calibrations/18.txt b/calibrations/18.txt
new file mode 100644
index 0000000..992288f
--- /dev/null
+++ b/calibrations/18.txt
@@ -0,0 +1,4 @@
+Hellen has 2 dolls.
+Troy has 3 more dolls than her.
+How many dolls does Troy have?
+How many dolls do they have altogether?
diff --git a/calibrations/19.txt b/calibrations/19.txt
new file mode 100644
index 0000000..b81c3e1
--- /dev/null
+++ b/calibrations/19.txt
@@ -0,0 +1,4 @@
+Dad gives Richard 7 feathers.
+Dad gives William 4 feathers.
+How many pens does Dad give to the two boys?
+How many more pens does Richard have than Dominic?