Creationism is not "against" modern science! In fact, the Biblical mandate to "subdue" the earth (Genesis 1:28) requires us to understand it, which is what science is all about. "Creation Science" is simply the practice of science with the assumption and acknowledgement that there is a creator God, versus the now standard operating assumption of naturalism (that nature is "all there is").
No one, including creation scientists, disputes that so-called "micro-evolution" (variation within a type of organism) caused by natural selection occurs and may be responsible for the large number of species found within a type. Almost all touted evidences for evolution are of this category (like Darwin's finches, the "peppered moth", or bacteria that become resistant to antibiotics). However, it is important to note that "micro-evolution" is a misnomer, as it implies that "a little" evolution is taking place. In actuality, NO evolution is taking place, as no increase in complexity (such as the development of a new organ) is being generated, but merely the emphasis of some already present traits over others.
Large scale change of one type of organism into another, so-called "macro-evolution", is beyond the ability of mutation coupled with natural selection to produce. Evolutionists acknowledge this is a "research issue". Even non-creation scientists (such as Denton and Behe) have written books giving the hard scientific facts that document why this is impossible.
The "geologic column", which is cited as physical evidence of evolution occurring in the past, is better explained as the result of a devastating global flood which happened about 5,000 years ago, as described in the Bible. Even evolutionists acknowledge that the fossil record is one of "fully-formed abrupt appearance" and "stasis" (that is, no change over time).
The belief that the atoms of a "Big Bang" eventually produced people ALL BY THEMSELVES (that is, without any intelligent guidance) is contrary to the well-proven Second Law of Thermodynamics, and the fundamentals of Information Theory. The universe is known to be "running down" yet evolution postulates it is "building up". Atoms to people evolution is much more a "religious belief" than a scientific fact.
There is no reason not to believe that God created our universe, earth, plants, animals, and people just as described in the book of Genesis!