Observe Your Shadow was the title of an observational experiment that was, among others, conducted in the scope of the past year's (2014–2015) first Slovene science competition for elementary school pupils between the ages of 6 and 13. The main reason for establishing a new science competition was popularization of science and its experimental methods, particularly among elementary school students. Elementary school teachers are not generally specialists in science, but rather have (and should have) extremely wide scopes of interests and competencies. By providing them with ideas and instructions for science experiments, we aim to enrich regular school lessons. In the first year alone, the competition took place in over half of Slovene elementary schools, with a total of 9000 participating students. In this paper we shall report about pupils' responses to tasks related to one of the experiments, namely, observation of their shadows on a sunny day.

1.
Dagmara
Sokolowska
, “
Firefly — A new contest in science for primary school
,”
Proceedings of GIREP-EPEC & PHES 2009, Physics Community and Cooperation: Selected Contributions
(
Lulu, The Centre for Interdisciplinary Science
,
2010
), pp.
352
357
.
2.
The call of the competition can be found on the webpage https://www.dmfa.si/Tekmovanja/NaOS/Razpis.aspx.
3.
E.
Etkina
,
A.
Van Heuvelen
,
D. T.
Brookes
, and
D.
Mills
, “
Role of experiments in physics instruction — A process approach
,”
Phys. Teach.
40
,
351
355
(
Sept.
2002
).
4.
Malcolm M.
Thomson
, “
Sundials
,”
Phys. Teach.
10
,
117
121
(
March
1972
).
5.
Michelle B.
Larson
, “
Constructing a portable sundial
,”
Phys. Teach.
37
,
113
114
(
Feb.
1999
).
6.
Eric
Jackson
, “
Daytime astronomy in the Northern Hemisphere using shadows
,”
Astron. Educ. Rev.
2
(
2
),
146
149
(
2004
).
7.
Ping-Wai
Kwok
, “
Studying the transit of the Sun using shadows
,”
Astron. Educ. Rev.
3
(
1
),
106
114
(
2004
).
8.
Barbara
Rovšek
, “
Calibration of a horizontal sundial
,”
Phys. Teach.
48
,
397
400
(
Sept.
2010
).
9.
Alejandro
Gangui
, “
Whither does the Sun rove?
Phys. Teach.
49
,
91
93
(
Feb.
2011
).
10.
Nestor
Camino
and
Alejandro
Gangui
, “
Diurnal astronomy: Using sticks and threads to find our latitude on Earth
,”
Phys. Teach.
50
,
40
41
(
Jan.
2012
).
11.
Frederic M.
Lord
, “
Formula scoring and number-right scoring
,”
J. Educ. Meas.
12
(
1
),
7
11
(Spring 
1975
).
12.
Gaea
Leinhardt
,
Orit
Zaslavsky
, and
Mary Kay
Stein
, “
Functions, graphs, and graphing: Tasks, learning, and teaching
Rev. Educ. Res.
60
(
1
),
1
64
(
1990
).
13.
Dave
Pratt
, “
Young children's active and passive graphing
,”
J. Comput. Assist. Lear.
11
,
157
169
(
1995
).
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